. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUIANAS 175. Fig. 68. Lycengraulis grossidens. Detail of head from a specimen 180-0 mm , Trinidad, BMNH prominent, four-fifths eye diameter ; eye covered by thin adipose tissue. Maxilla tip tapering, with blunt point, projecting just over half eye diameter beyond tip of 2nd supra-maxilla, not quite reaching to vertical from posterior margin of pre- operculum but about half pupil diameter beyond articulation of lower jaw (Figure 68) ; lower edge of maxilla with a single series of
. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUIANAS 175. Fig. 68. Lycengraulis grossidens. Detail of head from a specimen 180-0 mm , Trinidad, BMNH prominent, four-fifths eye diameter ; eye covered by thin adipose tissue. Maxilla tip tapering, with blunt point, projecting just over half eye diameter beyond tip of 2nd supra-maxilla, not quite reaching to vertical from posterior margin of pre- operculum but about half pupil diameter beyond articulation of lower jaw (Figure 68) ; lower edge of maxilla with a single series of caniniform teeth, short, more close-set and curving backwards anteriorly, the reverse in posterior part of jaw, the longest tooth one-fifth pupil diameter ; pre-maxillae with about a dozen similar but smaller teeth ; 1st (anterior) supra-maxilla a little longer than eye, pointed posteriorly and firmly attached to 2nd supra-maxilla, gradually broadening an- teriorly, firmly attached to tissue along upper edge of jaw ; 2nd (posterior) supra- maxilla also lying along top of maxilla, a slender shaft anteriorly, slightly expanded posteriorly, the last third visible externally and nearly half depth of maxilla at this point. Lower jaw slender, its greatest depth six times in its length ; edge of jaw with a series of 12-20 widely spaced caniniform teeth, the largest 3-5-4-0 times in eye diameter, sometimes interspersed with smaller and loosely attached teeth (Figure 69c) ; teeth near angle of jaw small, more close-set, those near symphysis even smaller, strongly curved and separated from the major teeth by a distinct diastema ; vertical from tip of lower jaw nearer to snout tip than to anterior border of eye. Postero-lateral projections of vomer with two to four strong caniniform teeth pointing backwards ; a single row of similar teeth along outer margins of palatine and ecto-pterygoid and inner margin of endo-pterygoid, much of the latter two bones also covered with short pointed tee
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